<template>
        <el-container class="home-container">
            <!-- 头部区域 -->
            <el-header>
                <div>
                    <img src="../assets/logo.png" alt="">
                    <span>电商后台管理系统</span>
                </div>
                <el-button type="info" @click="logout">退出</el-button>
            </el-header>
            
            <!-- 页面主体内容区 -->
            <el-container>
                <!-- 侧边栏 -->
                <el-aside :width="isCollapse ? '64px' : '200px'"> 
                    <div class="toggle-button" @click="toggleCollapse">|||</div>
                    <el-menu :collapse-transition='false' :collapse="isCollapse" 
                    unique-opened background-color="#333744" text-color="#fff" 
                    active-text-color="#409EFF" router
                    :default-active="activePath">
                        
                        <!-- 一级菜单 -->
                        <el-submenu v-for="item in menulist" :key="item.id" :index ="item.id+''">
                            <template slot="title">
                                <!-- 图标 -->
                                <i :class="iconsObj[item.id]"></i>
                                <!-- 文本 -->
                                <span>{{item.authName}}</span>
                            </template>
                            
                            <!-- 二级菜单 -->
                            <el-menu-item v-for="subItem in item.children" :key="subItem.id" 
                            :index="'/'+subItem.path" @click="saveNavState('/'+subItem.path)">
                                <template slot="title">
                                    <!-- 图标 -->
                                    <i class="el-icon-menu"></i>
                                    <!-- 文本 -->
                                    <span>{{subItem.authName}}</span>
                            </template>
                            </el-menu-item>
                        </el-submenu>
                    </el-menu>
                </el-aside>
                <!-- 内容区 -->
                <el-main>
                    <router-view></router-view>
                </el-main>
            </el-container>
        </el-container>
</template>

<script>
export default {
    data(){
        return{
            menulist: [],
            iconsObj:{
                '125':'el-icon-user-solid',
                '103':'el-icon-star-on',
                '101':'el-icon-s-goods',
                '102':'el-icon-s-order',
                '145':'el-icon-receiving'
            },
            isCollapse:false,
            activePath: ''
        }
    },
    created() {
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('active')
    },
    methods: {
        logout(){
            window.sessionStorage.clear()
            this.$router.push('/login')
        },
        //获取菜单内容
        async getMenuList(){
            const {data: res}= await this.$http.get('menus')
            console.log(res)
            if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
            this.menulist = res.data
        },
        //点击按钮收起侧边栏
        toggleCollapse(){
            this.isCollapse = !this.isCollapse
        },
        //保存链接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('active',activePath)
            this.activePath = activePath
        }
    },
}
</script>

<style lang="less" scoped>
    .home-container{
        height: 100%;
    }
    .el-header{
        background-color: #373d41;
        display: flex;
        justify-content: space-between;
        padding: 0px;
        align-items: center;
        color: #fff;
        font-size: 20px;
        > div{
            display: flex;
            align-items: center;
            span{
                margin-left: 15px;
            }
        }

    }

    .el-aside{
        background-color: #333744;
        .el-menu{
            border-right: none;
        }
    }

    .el-main{
        background-color: #eaedf1;
    }

    .icon-font{
        margin-right: 10px;
    }

    .toggle-button{
        background-color: #4a5064;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.1em;
        cursor: pointer;
    }
</style>